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- ...amaster has a rich set of Intel peripherals which consist of a 8251 USART, 8253 PIT, three 8255 PPI, 8257 DMA, 8259 PIC and 8279 CRTC. All of them, includi Having a 8253 PIT the computer has access to three independent programmable timers. ...19 KB (3,126 words) - 15:23, 12 September 2024